<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=
    , initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" 
    <!-- href="./index.css
    ">
    
</head>
<body>
    
      
    <input id="main" name="a" type="radio"/>
    <input id="c" name="a" type="radio"/>
    <input id="k" name="a" type="radio"/>
    <input id="a" name="a" type="radio"/>
    <input id="b" name="a" type="radio"/>
    <div>aaaaaaaaaaaa </div>
</body>
</html>